--- loncom/interface/lonsearchcat.pm 2001/11/28 14:02:31 1.104 +++ loncom/interface/lonsearchcat.pm 2001/11/28 16:47:25 1.105 @@ -7,103 +7,21 @@ # 3/20, 3/21, 3/22, 3/26, 3/27, 4/2, 8/15, 8/24, 8/25 Scott Harrison # 10/12,10/14,10/15,10/16,11/28 Scott Harrison # -# $Id: lonsearchcat.pm,v 1.104 2001/11/28 14:02:31 harris41 Exp $ -# +# $Id: lonsearchcat.pm,v 1.105 2001/11/28 16:47:25 harris41 Exp $ ### ############################################################################### ## ## ## ORGANIZATION OF THIS PERL MODULE ## ## ## -## 1. Description of functions ## -## 2. Modules used by this module ## -## 3. Choices for different output views (detailed, summary, xml, etc) ## -## 4. BEGIN block (to be run once after compilation) ## -## 5. Handling routine called via Apache and mod_perl ## -## 6. Other subroutines ## +## 1. Modules used by this module ## +## 2. Choices for different output views (detailed, summary, xml, etc) ## +## 3. BEGIN block (to be run once after compilation) ## +## 4. Handling routine called via Apache and mod_perl ## +## 5. Other subroutines ## ## ## ############################################################################### -# ---------------------------------------------------- Description of functions -# -# -# === WEB HANDLER FUNCTIONS -# BEGIN() : run once after compilation to initialize values -# handler(server reference) : interacts with the Apache server layer -# (for /adm/searchcat URLs) -# get_unprocessed_cgi() : reads in critical name/value pairs that may have not -# been processed and passed into %ENV by the web server -# make_persistent() : makes a set of hidden HTML fields to make -# SQL search interface information to be persistent -# -# -# === WEB INTERFACE COMPONENT FUNCTIONS -# simpletextfield(name,value) : returns HTML formatted string for simple text -# field -# simplecheckbox(name,value) : returns HTML formatted string for simple -# checkbox -# searchphrasefield(title,name,value) : returns HTML formatted string for -# a search expression phrase field -# dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML -# formatted string -# for a calendar date -# selectbox(title,name,value,%HASH=options) : returns HTML formatted string for -# a selection box field -# -# -# === SEARCH FUNCTIONS -# advancedsearch(server reference, environment reference) : perform a complex -# multi-field logical query -# basicsearch(server reference, environment reference) : perform a simple -# single-field logical query -# build_SQL_query(field name, logic) : builds a SQL query string from a -# logical expression with AND/OR keywords -# build_custommetadata_query(field_name, logic_statement) : builds a perl -# regular expression from a logical expression with AND/OR -# keywords -# recursive_SQL_query_build(field name, reverse notation expression) : -# builds a SQL query string from a reverse notation expression -# logical expression with AND/OR keywords -# build_date_queries(cmonth1, cday1, cyear1, cmonth2, cday2, cyear2, -# lmonth1, lday1, lyear1, lmonth2, lday2, lyear2) : -# Builds a SQL logic query to check time/date entries. -# -# -# === OUTPUTTING RESULTS FUNCTION -# output_results(output mode, -# server reference, -# environment reference, -# reply list reference) : outputs results from search -# -# -# === DIFFERENT WAYS TO VIEW METADATA RECORDS -# detailed_citation_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : -# see metadata viewing notes below -# summary_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : -# see metadata viewing notes below -# fielded_format_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : -# see metadata viewing notes below -# xml_sgml_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : -# see metadata viewing notes below -# ___________________________________________________________________________ -# | * Metadata viewing notes | -# | Output is a HTML-ified string. | -# | Input arguments are title, author, subject, url, keywords, version, notes,| -# | short abstract, mime, language, creation date, last revision date, owner, | -# | copyright, hostname, httphost, and extra custom metadata to show. | -# --------------------------------------------------------------------------- -# -# -# === TEST CONDITIONAL FUNCTIONS -# filled(field) : determines whether a given field has been filled -# -# -# === ERROR FUNCTIONS -# output_blank_field_error(server reference) : outputs a message saying that -# more fields need to be filled in -# output_date_error(server reference, error message) : outputs -# an error message specific to bad date format. - package Apache::lonsearchcat; # ------------------------------------------------- modules used by this module @@ -1573,3 +1491,245 @@ sub start_fresh_session { 1; __END__ + +=head1 NAME + +Apache::lonsearchcat - mod_perl module for handling a searchable catalog + +=head1 SYNOPSIS + +Invoked by /etc/httpd/conf/srm.conf: + + + PerlAccessHandler Apache::lonacc + SetHandler perl-script + PerlHandler Apache::lonsearchcat + ErrorDocument 403 /adm/login + ErrorDocument 500 /adm/errorhandler + + +=head1 INTRODUCTION + +This module enables searching for a distributed browseable catalog. + +This is part of the LearningOnline Network with CAPA project +described at http://www.lon-capa.org. + +=head1 BEGIN SUBROUTINE + +This routine is only run once after compilation. + +=over 4 + +=item * + +Initializes %language hash table. + +=item * + +Initializes %cprtag hash table (for copyright.tab). + +=item * + +Initializes %mimetag hash table (for filetypes.tab). + +=item * + +Initializes %hostdomains and hostips hash table (for hosts.tab). + +=back + +=head1 HANDLER SUBROUTINE + +This routine is called by Apache and mod_perl. + +=over 4 + +=item * + +configure dynamic components of interface + +=item * + +determine current user + +=item * + +see if a search invocation should be done + +=item * + +else, begin building search interface to output + +=item * + +compute date selection boxes + +=item * + +compute customized metadata field + +=item * + +print screen + +=back + +=head1 OTHER SUBROUTINES + +=over 4 + +=item * + +get_unprocessed_cgi() : reads in critical name/value pairs that may have not +been processed and passed into %ENV by the web server + +=item * + +make_persistent() : makes a set of hidden HTML fields to make +SQL search interface information to be persistent + +=back + +WEB INTERFACE COMPONENT FUNCTIONS + +=over 4 + +=item * + +simpletextfield(name,value) : returns HTML formatted string for simple text +field + +=item * + +simplecheckbox(name,value) : returns HTML formatted string for simple +checkbox + +=item * + +searchphrasefield(title,name,value) : returns HTML formatted string for +a search expression phrase field + +=item * + +dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML +formatted string for a calendar date + +=item * + +selectbox(title,name,value,%HASH=options) : returns HTML formatted string for +a selection box field + +=back + +SEARCH FUNCTIONS + +=over 4 + +=item * + +advancedsearch(server reference, environment reference) : perform a complex +multi-field logical query + +=item * + +basicsearch(server reference, environment reference) : perform a simple +single-field logical query + +=item * + +build_SQL_query(field name, logic) : builds a SQL query string from a +logical expression with AND/OR keywords + +=item * + +build_custommetadata_query(field_name, logic_statement) : builds a perl +regular expression from a logical expression with AND/OR keywords + +=item * + +recursive_SQL_query_build(field name, reverse notation expression) : +builds a SQL query string from a reverse notation expression +logical expression with AND/OR keywords + +=item * + +build_date_queries(cmonth1, cday1, cyear1, cmonth2, cday2, cyear2, +lmonth1, lday1, lyear1, lmonth2, lday2, lyear2) : +Builds a SQL logic query to check time/date entries. + +=back + +OUTPUTTING RESULTS FUNCTION + +=over 4 + +=item * + +output_results(output mode, server reference, environment reference, +reply list reference) : outputs results from search + +=back + +DIFFERENT WAYS TO VIEW METADATA RECORDS + +=over 4 + +=item * + +detailed_citation_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : +see metadata viewing notes below + +=item * + +summary_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : +see metadata viewing notes below + +=item * + +fielded_format_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : +see metadata viewing notes below + +=item * + +xml_sgml_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : +see metadata viewing notes below + +=back + + _____________________________________________________________________ + | * Metadata viewing notes | + | Output is a HTML-ified string. | + | Input arguments are title, author, subject, url, keywords, version, | + | notes, short abstract, mime, language, creation date, | + | last revision date, owner, copyright, hostname, httphost, and | + | extra custom metadata to show. | + --------------------------------------------------------------------- + +TEST CONDITIONAL FUNCTIONS + +=over 4 + +=item * + +filled(field) : determines whether a given field has been filled + +=back + +ERROR FUNCTIONS + +=over 4 + +=item * + +output_blank_field_error(server reference) : outputs a message saying that +more fields need to be filled in + +=item * + +output_date_error(server reference, error message) : outputs +an error message specific to bad date format. + +=back + +=cut